Holder



March 27, 1934. J' C, MORLQCK 1,952,385

HOLDER Filed June 5, 1931.

Patented Mar. 27, 1934 Unirse STATES PATENT OFFICE 1 Claim.

This invention relates to an abrading, polishing or cleaning head holder designed primarily for attachment to a dental hand piece for use in finishing and polishing dental work, but it is to be understood that a holder, in accordanceV with this invention may be employed in any connection for which it may be found applicable, and the invention has for its object to provide, in

'a manner as hereinafter set forth, a holder so constructed and arranged for maintaining thereon a polishing, cleaning or abrading head of circular` form set up from a coiled, closely Wound tape of polishing, cleaning or abrading material.

Further objects of the invention are to provide,

' in a manner as hereinafter set forth, a holder for the purpose referred to which is simple in its construction and arrangement, strong, durable, compact, thoroughly efficient in its use, readily installed in a dental hand piece, and inexpensive to manufacture.

With the foregoing and other objects in View, the invention consists of the novel construction of holder as hereinafter more specifically set forth and illustrated in the accompanying draw- "g ing, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modications can be resorted to which fall within the scope of the invention as claimed.

In the drawing wherein like reference characters denote corresponding parts throughout the several. views:-

Figure 1 is a Vertical sectional view of an abrading, cleaning or polishing head showing the adaptation thereof with respect to a holder therefor in accordance with this invention.

Figure 2 is a side elevation of the holder carrying the head.

Figure 3 is an end view of the holder with the head thereon.

Figure e is a section on line 4-4 Figure 3 upon an enlarged scale.

Figure 5 is a fragmentary view in longitudinal section cf the holder.

Figure 6 is a perspective view of the holder.

In the drawing, the abrading, cleaning and polishing head which is adapted to be secured to the holder is referred to generally at 7 and is formed from a closely wound length of abrad.- ing, cleaning and polishing material of tape like form 8 of the desired width. The inner terminal portion 9 of the tape is angularly disposed and the outer end terminal portion is secured by suitable adhesive material to the outer face of L a winding 10.

The holder is set up from a one-piece body formed of a stern 11 and a coupling part 12 forming an outward continuation of the latter and to which the abrading head is connected. The stem 1l and part 12 preferably are of circular cross section. The major portion of the length of part 12 is of less diameter than that of stem 11. The part 12 is of less length than that of stem 11 and the diameter thereof at its point of mergence with stem 11 is less than that of the latter to provide an endless peripheralshoulder 18 intermediate the ends of said one-piece body for bearing against the inner side of the abrading head.

The part 12 is formed of a head portion 13 for bearing against the outer side of the abrading head and a shank portion 14 of a length corresponding to the width of the abrading head. The head portion 13 is at the outer end of and of greater diameter than that of shank portion 14. The part 12 is formed throughout lengthwise thereof with a furcation 15 for the reception of the inner end portion 9 of the tape from which the abrading head is constructed. The furcation 15 forms the head portion 13 and the shank portion 14 throughout of a pair of spaced parallel sections. The furcation 15 is disposed at the longitudinal median of part 12. The stem 11 is solid. Each section of head portion 13 is solid. Each section of shank portion 14 is solid.

The periphery of stem 11 is smooth. The periphery of the shank portion 14 is formed throughout with alternately disposed circumferentially extending grooves and pointed ribs 16, 17 respectively. The sections of the shank 14' are solid and of segmental contour. The ribs 17 engage in the inner Winding 19 of the head 7 and which constitute grippers. The head 13 has its edge beveled as at 20. The grippers are arranged in spaced relation. The shank is non-tapered and of circular cross section.

The head 7 is interposed between the beveled edge cf the head 13 and shoulder 18 when secured upon the holder. k

The form of holder enables a head 7 when worn or damaged to be readily removed and a new Vone substituted. The stem 11 is adapted to be detachably connected to the dental hand piece.

What I claim is:-

A rotatable holder for anannular abrading head of coiled form comprising a one-piece body formed of a stem for connection with a prime mover and a non-tapered circular coupling part providing an outward integral continuation of the stern and adapted to have the abrading head connected thereto, said coupling part consisting ULG of a shank portion of a length corresponding to the width of and to which the abrading head is connected and a head portion at the outer end of and of greater diameter than the shank portion to provide a shoulder for bearing against the outer side of the abrading head, said shank portion being of less diameter than the stem Ithereby providing at the point of joinder 'thereof with theistem an endless peripheral shoulder for bearing against .the inner side of the abrading head, said coupling part being formed with a furcation extending lengthwise thereof from its point of joinder with said stern to its outer end 

